2.2.15.8. Check and repair of a saddle of the valve

Fig. 2.147. Measurement of width of a saddle of the valve

Measure width of a contact surface of a saddle of the valve. In case of need, process a saddle or a plate of the valve, using the corresponding adaptation (fig. 2.147).

Standard width: 1,2–1,6 mm.

Fig. 2.148. Ways of processing of a saddle of the valve the cutting tool

Check centering of a contact surface concerning a saddle of the valve (fig. 2.148).

If the contact surface is displaced outside, process a valve saddle the cutting tool with a working corner 70 ° (Admission) or 65 ° (Release) and the cutting tool with a corner 45 °.

If the contact surface is displaced inside, process a valve saddle the cutting tool with a working corner 30 ° (Admission) or 0 ° (Release) and the cutting tool with a corner 45 °.

Fig. 2.149. Measurement of a vystupaniye of a saddle of the valve

Check deepening of a saddle of the valve. Measure a vystupaniye (size L) of a core of the valve (fig. 2.149).

If the measured height does not meet standard, replace a head of the block of cylinders.

Standard size L:

- Admission: 40,64–42,24 mm;

- Release: 40,50–42,10 mm.